| Title | The association of Angelman's syndrome with deletions within 15q11-13. | | Author(s) | Pembrey M, Fennell SJ, van den Berghe J, Fitchett M, Summers D, Butler L, Clarke C, Griffiths M, Thompson E, Super M | | Institution | Institute of Child Health, London. | | Source | J Med Genet 1989 Feb; 26(2):73-7. | | MeSH | Ataxia
Child
Chromosome Deletion
Chromosomes, Human, Pair 15
Epilepsy
Humans
Karyotyping
Laughter
Mental Retardation
Movement Disorders
Syndrome
| | Abstract | The inheritance of Angelman's syndrome, a disorder characterised by mental retardation, epilepsy, ataxia, and a happy disposition, is debated because affected sibs occur less frequently than expected with autosomal recessive inheritance. After discovering two unrelated patients with a small deletion of the proximal long arm of chromosome 15, 10 further patients with Angelman's syndrome were reassessed. Five had apparently normal karyotypes, four had a deletion within 15q11-13, and one had a pericentric inversion, inv(15)(p11q13) involving the same chromosomal region. In the latter case, the healthy mother had the same pericentric inversion, indicating that the patient also had a submicroscopic mutation on his other chromosome 15. These data map the Angelman locus to 15q11-13 and suggest that de novo visible deletions (associated with a low recurrence risk) and autosomal recessively inherited cases combine to give an overall sib recurrence risk of less than 25%. | | Language | eng | | Pub Type(s) | Journal Article
| | PubMed ID | 2918545 |
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